Stove-grate.



No. 880,472. PATENTED FEB. 25, 1908,

' T. J. STAFFORD.

STOVE GRATE. APPLICATION FILED JULY8 1907.

-2 SHEETS-SHEET 1.

awe amass PATENTED FEB. 25, I908 T. J. STAFFORD.

STOVE GRATE.

APPLICATION FILED JULYB, 1907.

2 SHEETS-SHEET 2.

atl'omuu o UNTTED STATES PATENT OFFICE.

THOMAS J. STAFFORD, OF BROOKLYNIOWA STOVE-GBATE.

Specification of Letters Patent.

Patented Feb. 25, 1908.

Application filed July 8. 1907- Serial No, 382.728.

clear, and exact description of the invention,

such as will enable others skilled in the art to which it apportains to make and use the same.

This invention relates to in'iprovements in stove grates...

The object of the invention is to provide a gratc'so constructed and arranged that air will be admitted to the center of the fire and having means whereby the clinkers and cinders will be finely broken up and discharged through the grate.

With this objectin view, the invention consists of certain novel features of construction, combination and arrangement of parts as will be more particularly described and fully pointed out in the appended claims. I

in the accompanying drawings, Figure 1 1s a vertical sectional View through the lower portion of a stove, showing the application of the grate; Fig. 2 is a vertical sectional view of the grate removed from the stove; Fig. 3 is a similar view at rightanglcs to Fig, 2, showing the center of the grate open; Fig. 4 is a top plan view of the grate; and Fig. 5 is a bottom plan view of the same, showing the arrangement-of the operating mechanism.

in the embodiment of my invention I provide a centrally disposed supporting ring 1, having formed thereon an annular, radially projecting flange, 2. On the up an side of the ring 1 and supported by the ange, 2, is a revoluhly mounted circular grate section 3, in which is formed an annular series of radially disposed openings through which ashes and cinders are adapted to pass. On the underside of the grate 3, adjacent to its outer. edge is formed an annular rack, 4, with which is adapted to be engaged a suitable operating mechanism. hereinafter described.

()n the u )per side of the ring 1 is arranged an upwardly projecting dome, j'wllich is substantially conical'in shape, and is pro- \idedin its sides with a series of vertically lisposed slolsol' passages, (Q, and in its upper end with n series of vertically di posed holes, 7. Formed on the lower endof the innerside of the dome 5 are fastening lugs, 8, which project downwardly and engage recesses 9, formed in the inner wall of the ring 1, said lugs being bolted or otherwise, secured to the lower portion of the ring 1 below the flange 2, thus firmly holding the dome in place. The lower edge of the dome is flared outwardly to form a radially projecting annular flange, 10, which engages the upper side of the inner portion of the circular grate 3, and serves to hold said-grate in position on the ring, 1.- At diametrically opposite points on the lower end of'the dome 5 are formed radially projecting grate-ens gaging lugs 12., which project over the open portion of the grate. The lower sides of the lugs 12-are squared or flattoclosely engage the upper side of the grate, and said lugs serve, in connection with the grate' bars formed by the openings in the grate, to form a crushing mechanism whereby the. cinders and clinkers carried around by the grate when the latter is bscillated, willbe finely broken up so that the same maybe readily passed through the openings in the grate.

At diametrically opposite points to the lower end of the ring 1 are formed apertured bearing lugs 13, in which is revolubly mounted a shaft 14, one end of which is-adaptcd to project through the side of the stove, andis provided with a s uared a wrench or cranr ham portion to receive M le, by means ofwhich the shaft may be oscillated or revolved.

Keyed or otherwise secured to the shaft below the rack 4 is a spur gear pinion, 15 which is adapted to engage the teeth of said rack,

whereby when the shaft is revolved or osoillated, the circular portion of the grate will be revolved or oscillated by the pinion.

Fixedlymounted on this shaft 14 within the ring 1, is an inner gratesection, 16, which is in the form of a plate having an enlarged extends. The cessed on each side of the enlarged central,

ortion to form a series of grate fingers or bars, 17. The grate section 16 is fixedly socentral portion through which the shaft 14 late 16 is notched or rea cured to the operating shaft by means of a set-screw, 18, sov that the said section is rej volved or oscillated with the shaft, and when thus moved, serves as a fan to create a draft or to force air into the center of the firethrough the slots and holes 6 and 7 in the dome.

. porting ring, an annular grate revolub Having thus fully described my invention} reduce the cinders' and clinkers in the fire, what I claimas new and desire to secure by an operating shaft j ournaled in the lower side Letters-Patent is: of said supporting ring, a spur gear pinion 1. Astovc grate comprisingacircular supmounted on said shaft and adapted to en; porting ring, an annular grate mounted on gage the annularrack on said grate whereby 6 said rin an apertured do'me above said grate, the latter 1s oscillated, substantlally as dean annu ar rack formed on said grate, a revoscribed. lubly mounted operating shaft, a gear pinion 4. A stove grate comprising a centrally on said shaft to engage said rack, whereby disposed supporting ring, a circular grate said grate is oscillated, and a grate section .revolubly mounted on said rin an annular revolubly mounted said supporting ring rack'fornied on the undersideo said grate, a and adapted to serve as a fan to force air slotted dome mounted on the upper side of up through said dome, substantially asdesaid ring,-a grate retaining flange formed on scribed. the lower end of said dome, oppositely dis- 2. Astove grate comprisingacircularsup- 1posed cinder crushing lugs formed on'the wer end of the dome to react with said mou'fi'ted on said ring, said grate havin grate, an operating shaft revolublymounted formed therein a series of radially dispose in the lower sides of said ring, a spur gear pin openings, a slotted air-conducting dome se-' 'ion on said shaft to engage the rack on the cured to said ring and projectin upwardly underside of said grate, afan mounted on said into the fire box, means on said dome to co shaft Within said. supporting ring, said fan act with said circular grate whereby the cincomprising a plate, a series of oppositely roders and clinkers are crushed or'broken up, jecting fingers forniedpn opposite sides 0 the means to oscillate said grate, and a fan same, whereby when said shaft is operated, adapted to force air throughsaidslotted said plate will be oscillated i or revolved to dome into the center of the fire, substantially force a current of air througli said dome and as described. into the center of the fire, substantially as de 3. A stove grate comprising a supporting scribed. ring, a circular grate revolubly mounted on In testimony whereof I have hereunto set sai ing, an annular rack formed on the 'uny hand in presence of two subscribing Witderside of said grate, an upwardly projecting nesses.

air-conducting dome secured to the up er THOMAS J. STAFFORD.

side 'of the ring above said grate, cin er- Witnesses:

crushing lugs formed on said dome to co- EDW. H.TALBOTT,

act with the bars of said circular grate to B. M. TALBOTT. 

